Google is a very smart search engine and canonical urls are very common on the web. even without any seo optimizations q2a lists are already following seo standard. the only reason that it's worth working on is to prevent duplicate data in lists.

3 Answers

As promised development of this plugin is going on. development of 6 out of 9 sections of this plugin is finished. including "Title Customization" and "Scalable(Network) XML sitemaps" which were not available before. "Network Sitemap" feature in this plugin is a must have feature for large Q&A sites.